CVE-2024-49106 in Windows
Summary
by MITRE • 12/12/2024
Windows Remote Desktop Services Remote Code Execution Vulnerability
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Analysis
by VulDB Data Team • 06/18/2026
This vulnerability involves a critical remote code execution flaw in Windows Remote Desktop Services that allows attackers to execute arbitrary code on affected systems without authentication. The vulnerability stems from improper input validation within the RDP protocol implementation, specifically in how the system handles certain malformed packets during the authentication process. Attackers can exploit this weakness by sending specially crafted RDP packets that trigger buffer overflows or memory corruption issues within the rdpdr.sys kernel driver. The flaw exists in the way Windows handles resource redirection requests during RDP sessions, making it particularly dangerous as it can be exploited from external networks without requiring valid credentials. This vulnerability has been classified under CWE-121 as a buffer overflow condition and aligns with ATT&CK technique T1110 for credential access and T1071 for application layer protocol usage. The impact extends beyond simple code execution to potentially allow full system compromise, data exfiltration, and lateral movement within networks. Organizations running RDP services are at significant risk as this vulnerability can be exploited by automated scanning tools, making it a prime target for widespread exploitation. The vulnerability affects multiple Windows versions including server editions and workstation operating systems that have RDP enabled. The attack surface is particularly broad since RDP is commonly exposed to the internet for remote administration purposes, creating numerous entry points for threat actors. Microsoft has released patches addressing this vulnerability through security updates, but many organizations remain vulnerable due to delayed patch deployment or misconfigured RDP settings.
The technical exploitation of this vulnerability relies on the attacker's ability to manipulate the RDP protocol stack to cause memory corruption. The flaw occurs during the processing of device redirection requests where the system fails to properly validate the length of incoming data structures. This allows attackers to overwrite critical memory locations and potentially execute malicious code with system-level privileges. The vulnerability is particularly concerning because it can be triggered through the standard RDP connection process, making it difficult to detect through normal network monitoring. Network traffic analysis reveals that the exploit typically involves sending malformed device redirection packets that cause the RDP service to crash or behave unpredictably. The exploit chain often includes memory manipulation techniques such as stack smashing or heap corruption to gain control over the execution flow. Security researchers have identified that the vulnerability can be triggered through various attack vectors including direct network connections, proxy configurations, or even through compromised RDP gateway implementations. The lack of authentication requirements makes this vulnerability especially dangerous in environments where RDP is exposed to untrusted networks. Organizations that have not properly configured their RDP services to restrict access or implement additional security controls remain particularly vulnerable to this type of attack.
Organizations affected by this vulnerability face significant operational impacts including potential data breaches, system compromise, and service disruption. The vulnerability enables attackers to establish persistent backdoors, install malware, or extract sensitive information from compromised systems. The exploitation process can result in complete system takeover, allowing threat actors to perform reconnaissance, escalate privileges, and move laterally within the network. Recovery from such attacks typically involves complete system reinstallation, forensic analysis, and extensive security remediation efforts. The financial impact includes not only direct costs for remediation but also potential regulatory fines, legal expenses, and reputation damage. Incident response teams must conduct thorough investigations to determine the full scope of compromise, often requiring analysis of network logs, system memory dumps, and forensic examination of affected systems. Organizations with inadequate security monitoring may not detect exploitation attempts until significant damage has occurred. The vulnerability also affects compliance requirements under various regulatory frameworks including pci dss, hipaa, and soc 2, as it represents a critical security gap that can lead to unauthorized access to sensitive data. Additionally, the vulnerability can be leveraged in advanced persistent threat campaigns where attackers establish long-term access to target networks. The exploitation often goes undetected for extended periods due to the legitimate nature of RDP traffic, making this vulnerability particularly challenging to defend against through traditional network security controls.
Effective mitigation strategies should include immediate patch deployment for all affected Windows systems, followed by network segmentation to restrict RDP access to trusted networks only. Organizations should implement multi-factor authentication for RDP connections and disable unused RDP features such as legacy authentication protocols. Network access controls should be configured to limit RDP port exposure and implement rate limiting to prevent automated exploitation attempts. Security monitoring should include detection of anomalous RDP traffic patterns and unusual connection behaviors that may indicate exploitation attempts. Regular security assessments should verify that RDP configurations follow industry best practices and that all systems are properly updated. Network engineers should consider implementing RDP gateway solutions to provide additional security layers and centralized management of remote access. System administrators should disable unnecessary RDP features and ensure that only required services are enabled. Regular vulnerability scanning should identify systems with outdated RDP implementations or misconfigured security settings. The implementation of zero trust principles for remote access can significantly reduce the risk associated with this vulnerability. Additionally, organizations should maintain up-to-date incident response procedures specifically tailored to handle RDP-related security incidents and ensure that security teams are trained to recognize and respond to exploitation attempts. Regular security awareness training should emphasize the risks associated with exposing RDP services to untrusted networks and the importance of maintaining secure remote access practices.